How long will Southern California heat last?

The forecasted high temperatures for Monday, April 9, 2018, as a heat wave was set to descend on Southern California. (Click for a larger image)
LOS ANGELES — Southern California temperatures will spike today, reaching the 90s and threatening to reach record highs in some communities, amid high pressure aloft and Santa Ana winds, the National Weather Service said.
A wind advisory is scheduled to be in effect in the L.A. County portion of the Santa Gabriel Mountains, where gusts of up to 60